Hi Ashaman,
I'm glad you're finding this helpful. I really get a lot of value having to put myself in other coach's/runner's shoes. It's a great exercise to make sure that my ideas are well fleshed out which always makes me look at my own program as well. So if you do ever want to ask something outside of the message boards I have an email address linked to my username. I don't check it often but I'd be happy to help where I can.
Getting to your athlete and training I don't think you're far off at all. I'm going to rewrite the plan below and try to elaborate on parts of it.
Monday - Intensive/Extensive tempo
Tuesday - AM: Lift (Olympic or static)
PM: run with 10s pickups
Wednesday - Acceleration/Speed Dev.
Thursday - Intensive/Extensive tempo
Friday - Lift (Olympic or Static) + Run (if applicable)
Saturday - Off
Sunday - 4-6x6s hills + Plyometrics
Hopefully that's a fair translation. I would consider pairing things up a little differently. Right now you have 4 neuromuscular days (Tuesday, Wednesday, Friday, and Sunday). That's a lot even for sprinters, but if there are sprint coaches here that have had success with it I hope they correct me. Its hard to get the power out-put that you want from acceleration/speed development doing it after a lift but it would be more ideal to have them on the same day.
You want your work in the weight room to reinforce what you're doing on the track. I see a lot of programs put hard/heavy lifts after longer aerobic days and I think it just confuses the body. You're telling it that it needs to be efficient and aerobic on the run then wait, you also need to be very explosive and powerful. Our bodies aren't clever enough to make adjustments in both areas as efficiently as if there was just one clear stimulus being addressed in each session. Depending on how early her lifting class is it might be worth getting her on the track for some acceleration/speed development on Monday before that class starts.
Your girl has some aptitude in the mile as well. While I understand the allure of going for more of a 400/800m plan the reality is that you might never find a true 400/800m girl who can run a 4:38 in the 1500m or an 18:45 5k for that matter. Now if she ran those times when she was 15/16 then those days might be past her given how girls develop. But I think its work considering a continuous tempo in place of the second intensive/extensive tempo day. For a 2:27 girl she's probably be looking at 6:49 pace for 10 minutes, 6:57 for 15 minutes, or 7:05 for 20 minutes. Those numbers are from a chart that I use for my 400/800m runners, your girl might find that pretty easy given her endurance, but it has been very good to me for my 800m runners.
On a more general note, I don't disagree with going for more of a 400m slant to get her speed back where it needs to be. To run 2:11 she probably needs to be in the 58 low ball park. I think you can still have a day in there that is on the long side. Our sprint coach does something similar to me where he works short and long at the same time and gradually moves each toward race specific work.
Ron Grigg over at Jacksonville University does the same thing and I've borrowed a lot of his work in my early days of coaching. Ever since I came across his stuff I really haven't had to change a whole lot to our program. He has some good stuff posted on completetrackandfield:
http://completetrackandfield.com/4-goals-of-400-meter-800-meter-training/His PowerPoints are pretty helpful but basically say that your "speed" should progress like this:
1. Acceleration development
2. Speed Development
3. 100m race pace
4. 200m race pace (speed endurance)
5. 400m race pace (SE1)
6. 800m pace
And that your "endurance" components should progress like this:
1. Easy runs
2. Continuous tempos
3. 10k pace
4. VO2max (3k pace/ extensive tempo)
5. 1500m pace (intensive tempo)
6.800m pace
Basically they both meet up at the 800m with some overlap with the 400m.
I don't use all of those steps but the progression will give you a pretty good idea of what's going on. I like this because it generally balances itself out the whole season while making sure that you start out with very little lactate production and lets you gradually let athletes get used to workouts with a little more acidity and a little more similar to their eventual race. It also gives you a pretty good feel for phases, in a 6 month progression you can basically allocate a month for each and you'll probably already have a more sound program than many other coaches.
Is there any ability for her to workout before her lifting class? I think you can do a lot if that is the case. But otherwise you have a pretty good grasp on it, I'd just try to drop a neuromuscular day and have one longer day in there. Her endurance is a great tool that a lot of 400m runners will never have, don't let it go to waste.